Cross-Browser Rounded Buttons with CSS3 and jQuery

I was tasked with replacing several dozen Photoshop-generated rounded buttons for a larger site with an HTML/CSS/JS equivalent. Prior, any time anyone wanted to change text on a button (and it seemed to happen often), a graphic designer had to fire up Photoshop, modify a file, adjust for size, output an image, and pass that file off to the person building the page.